Nina L. Diaz Promoted to Head Unscripted at MTV, VH1

New MTV president Chris McCarthy is looking to a rising star from VH1 to head unscripted.

McCarthy has tapped VH1's Nina L. Diaz - an MTV grad - to head unscripted for both Viacom-owned cable networks, The Hollywood Reporter has learned.

Diaz joined VH1 in 2014 and was promoted in June to exec vp and head of reality programming and development. She will now serve as head of unscripted for MTV and VH1, where she'll oversee development and production of all unscripted programming for both cable networks.

Diaz's promotion helps fill the void created by Michael Klein, who exited as head of originals following a six-month run. Klein oversaw both scripted and unscripted, with Diaz now charged with overseeing the latter. MTV's scripted fare - including Scream, Teen Wolf and The Shannara Chronicles - will continue to be overseen by Mina Lefevre. VH1's scripted, including The Breaks, will continue to be overseen by senior vp, scripted Maggie Malina.

"Nina has made a career of developing big, bold series that cut through and emerge as cultural touchstones, from Martha & Snoop to Cribs to the most successful seasons of Love & Hip Hop," McCarthy said in making the announcement Tuesday. "I couldn't ask for a better partner, and I'm thrilled she'll be taking on this expanded role and building on her incredible legacy at MTV and VH1."

The promotion marks a return for Diaz to MTV, where she started her career developing unscripted series, including My Super Sweet 16 and The Osbournes. Diaz left MTV to become an independent producer during which time she developed The Real Housewives and Mob Wives, the latter of which brought her to VH1.

During her tenure at VH1, Diaz has developed some of the cabler's biggest hits, including Love & Hip Hop as well as Martha & Snoop's Potluck Dinner Party, the latter of which has already been renewed for a second season. She was instrumental in reviving America's Next Top Model at VH1.

"I'm humbled by this wonderful opportunity to return to MTV, while continuing to work with my incredibly talented colleagues at VH1. Chris is a true visionary and I'm grateful for his trust in me. VH1 and MTV have contributed so much to the unscripted genre and it's an honor to tell stories through the lens of these iconic brands," Diaz said.

The promotion comes a day after Klein exited MTV following a six-month run and a month after MTV president Sean Atkins departed, with McCarthy stepping into the latter role.